The Math.SQRT1_2
property represents the square root of 1/2 which is approximately 0.707:
Property attributes of Math.SQRT1_2 |
|
---|---|
Writable | no |
Enumerable | no |
Configurable | no |
Description
Because SQRT1_2
is a static property of Math
, you always use it as Math.SQRT1_2
, rather than as a property of a Math
object you created (Math
is not a constructor).
Examples
Using Math.SQRT1_2
The following function returns 1 over the square root of 2:
function getRoot1_2() { return Math.SQRT1_2; } getRoot1_2(); // 0.7071067811865476
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
ECMAScript 5.1 (ECMA-262) The definition of 'Math.SQRT1_2' in that specification. |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Math.SQRT1_2' in that specification. |
Standard | |
ECMAScript 2017 Draft (ECMA-262) The definition of 'Math.SQRT1_2' in that specification. |
Draft |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |